Caster



Dec, 7 1926. 1,610,165

A. SCHMIERER CATER Filed April 14'. 1925 IN V EN TOR ATTORNEY Patented Dec. 7, 1 926.

This invention relates to improvements in casters for furniture legs thelik'eeaiid it is the principal object of the invention .to prdvide a "caster which touches its hous ing at a small number of points, towhi'ch lubrication is added, thus "preventing wearing out to a certain extent.

Another object of the invention 'is the provision of a-caster allowing a rolling of.

its ball in any direction, and one in which the ball is held within its housing without the employment of special means for. this purpose and also providedwith proper lubrication. v

A further object of the invention is the provision of a caster of simple'and inex- Fig. 2 isa sectional elevation thereof. a

Fig. 3 is a similarjview to Fig. 1' showing the casterias may be applied to. metal. Fig. 4 is asectional elevation of a modifie'd form of my improved caster.

. Fig. 5is a sectional elevation of another f modification ofthe caster.

The caster according to the present in vention has a housing equipped at its closedtop with a screw 11 or the like for readily attaching'the housing to the legs of a piece offurniture or the like. The housing 10 has. a dome-shaped up- 'per part 12, and a lower bevelled. edge 13.

Within the housing a chamber is formed, designated l i of a multiangular configuration, in which .a' ball 15 is located protruding with its lower, floor engaging face from the housing. This ball is engaging the up-v per wall ofv the'chamber'14 at one theoreti I cal point, 16 only. 7 The ball is held by the lower edges of case 10 as at lfi' which may be spun over, to grip the ballafter the latter has been inserted in the chamber. Two

lubricating channels are guided from the outer-periphery of the housing to the cham'-' ber 14, for lubricatmgjpurposes, and suitabl'plugstl, and 32 close "the upper month's orthesechaiii'iel's.

In the msaificaicn :sliow'n in Fig. sat

u per gra ings-housing 1'0 is straight and is equlp'ped with a metal "screw 11. modified form of, the invention 'illi'istrat'ed in Figure 4, the chamber 17 at its top Wall has a median protuberation or boss 18 hav 1 ing a'bowl-sh'aped seat at its lower 'end for seating part of the outer periphery of the ball 19;. The fasteningor holding screw in" this form is designated 20, and the ball is held in the chamber by means of the lower, I comparativelywide flange 21 of the housing which may be spun over, to grip the cliamber.- 7 Two lubricating channels are guided from the outer" periphery of the housing to the chamber 17 for lubricating In the ball after the latter has been inserted in the purposes, and suitable plugs 31, and 32 close the upper mouths of these channels,

In themodification illustratedin Figure 5, the casing 22 has a chamber 23 formed therein having a boss 24t-formed in the top wall thereof forming a seat for the ball, and shoulders 25 are formed on the innerface of the top wall forming with said boss 24 two small chambers 27, '28. designated 29 in this form and the securing screw 30. :Two lubricating channels are guided from the outer periphery of, the housing to .the chambers 27, 28 for lubrieating purposes and suitable plugsy3l, 32 close the uppe-r mouths of. these channels." As shown on the, drawing these channels are obliquely. directed from the outer periphery.

to the highest points in the chamber,so that the inserted lubricant may work its way theoretically downward due to gravity, to

contact pointsbetween the ball and the chamber. g

It will be clearfrom the above descrip tion, that in the form of the invention illustrated in Figures 1, .2, and 3,the ball touches the top wall of the housing at atheoretical single point-only. V r

'The ball 19 ofthe form of my invention illustrated in:Figure 4 has a seatin the boss.

The ball is 18 and is held in plaoe in the housing by- 7 means of the comparatively wide lower edges or margins of the same. 1 The ball 29 in the modification illustrated in Figure 5Jis normally seated on'theseat formed in the boss 24,'and if this bossis 'worn out or down, the ball will come into engagement With the seat formed by the shoulders 25, 26. In this form the means for providing for an eflicient lubrication are the plug-closed channels communicating with the chambers' 27, 28, and the ballis held within its casing or cage or housing by means of the sharp-angled flanges or margins 33 which are spun into the proper positions. 1 i

It is to beunderstood that while I have illustrated by way of example a few of the forms in which my device may be used,

" other changes may be made in the construction of the same without departure from the scope of the invention as defined in the claim.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

Thecombination in a caster, of a housing 7 in said chamber, said housingbeing formed with a lubricating channel guided from the outer periphery to the highest point in said smaller chamber, whereby lubricant may be fed through said channel to points of contact between said ball and chamber. I

In testimony whereof I have 'affixed my signature. I

ARTHUR SCI-IMIERER. 

